碳钢，合金钢或不锈钢，压力密封或螺栓阀帽用于焊接在螺栓阀帽阀门上阀座的设备。
Carbon, Alloy or Stainless Steel, Pressure seal or Bolted Bonnet Provision for seal Welding on Bolted Bonnet Valves.
碳钢，合金钢或不锈钢，压力密封或螺栓阀帽用于焊接在螺栓阀帽阀门上阀座的设备。
Carbon, Alloy or Stainless Steel, Pressure seal or Bolted Bonnet Provision for seal Welding on Bolted Bonnet Valves.
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